SEMICONDUCTORS
BD643/645/647/649/651
SILICON DARLINGTON POWER TRANSISTORS
NPN epitaxial-base transistors in a monolithic Dalrington circuit and housed in a
TO-220 enveloppe. They are intended for output stages in audio equipment,
general amplifiers, and analogue switching application.
PNP complements are BD644, BD646, BD648, BD650 and BD652
ABSOLUTE MAXIMUM RATINGS
Symbol
Ratings
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
Value
60
80
100
120
140
45
60
80
100
120
5
Unit
V
CBO
Collector-Base Voltage
V
V
CEO
Collector-Emitter Voltage
V
V
EBO
Emitter-Base Voltage
V
I
C
Collector Current
8
A
I
CM
Collector Peak Current
12
A
Page 1 of 5
SEMICONDUCTORS
BD643/645/647/649/651
Symbol
Ratings
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
Value
Unit
I
B
Base Current
150
mA
P
T
Power Dissipation
@ T
mb
< 25°
62.5
Watts
T
J
Junction
Temperature
150
°C
-65 to +150
T
s
Storage Temperature range
Limiting values in accordance with the Absolute Maximum System (IEC 134)
THERMAL CHARACTERISTICS
Symbol
R
thJ-MB
Ratings
From junction to mounting base
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
Value
2
Unit
K/W
R
thJ-A
From junction to ambient in free air
70
K/W
Page 2 of 5
SEMICONDUCTORS
BD643/645/647/649/651
ELECTRICAL CHARACTERISTICS
TC=25°C unless otherwise noted
Symbol
Ratings
Test Condition(s)
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
Min Typ Mx Unit
I
E
=0,V
CB
=V
CEO
MAX
-
-
0.1
mA
I
CBO
Collector Cutoff Current
I
E
=0,V
CB
=1/2 V
CBO
MAX,
T
J
=150°C
-
-
1
mA
I
CEO
Collector Cutoff Current
I
E
=0, V
CE
=1/2 V
CEO
MAX
-
-
0.2
mA
I
EBO
Emitter Cutoff Current
V
EB
=5 V, I
C
=0
-
-
5.0
mA
I
C
=4 A, I
B
=16 mA
V
CE(SAT)
Collector-Emitter saturation
Voltage (*)
I
C
=3 A, I
B
=12 mA
I
C
=5 A, I
B
=50 mA
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
2
-
-
-
-
-
2
2
2
2
2.5
2.5
2.5
2.5
2.5
V
V
BE(SAT)
Base-Emitter Saturation
Voltage (*)
I
C
=12 A, I
B
=50 mA
-
-
3
V
Page 3 of 5
SEMICONDUCTORS
BD643/645/647/649/651
Symbol
Ratings
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
BD643
BD645
BD647
BD649
BD651
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
750
-
-
-
-
-
750
-
-
-
-
-
10
-
-
-
-
-
10
10
10
10
Value
-
-
-
-
-
-
-
-
-
-
2.5
-
-
-
-
-
2.5
2.5
2.5
2.5
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Unit
I
C
=4 A, V
CE
=3 V
V
BE
Base-Emitter Voltage (*)
V
I
C
=3 A, V
CE
=3 V
V
CE
=3.0 V, I
C
=0.5 A
1900
V
CE
=3.0 V, I
C
=4 A
h
FE
DC Current Gain (*)
V
CE
=3.0 V, I
C
=3 A
-
-
-
-
-
-
-
-
-
-
-
V
CE
=3.0 V, I
C
=8 A
1800
V
CE
=3.0 V, I
C
=4 A, f=1MHz
h
fe
Small Signal Current Gain
V
CE
=3.0 V, I
C
=3 A, f=1MHz
-
-
-
-
-
-
-
-
-
-
(*) Pulse Width
≈
300
µs,
Duty Cycle
∠
2.0%
Page 4 of 5
SEMICONDUCTORS
BD643/645/647/649/651
MECHANICAL DATA CASE TO-220
DIMENSIONS
mm
A
B
C
D
E
F
G
H
L
M
N
P
R
S
T
U
Pin 1 :
Pin 2 :
Pin 3 :
9,86
15,73
13,37
6,67
4,44
4,21
2,99
17,21
1,29
3,6
1,36
0,46
2,1
5
2,51
0,79
inches
0,39
0,62
0,52
0,26
0,17
0,16
0,11
0,68
0,05
0,14
0,05
0,02
0,08
0,19
0,098
0,03
Anode 1
Anode 2
Gate
Page 5 of 5